Same stores comps were up slightly at +0.4%, a bit of a slowdown from +2.1% comps in Q3. Full year 2018 comps came in at +2.6%, at the lower end of prior guidance of +2.5-3.5%. So Q4 was a bit of a drag on full year results. Looking ahead, LL expects Q1 comps to come in at negative low-single-digits and full year 2019 comps to be flat to up low-single-digits.
Regarding that weak comp number, keep in mind that merchandise sales were negatively impacted in the Texas market and Florida, to a lesser extent., as LL was lapping the peak of the Harvey storm demand in the prior year period. In terms of category performance, LL continues to see strong growth in vinyl products offsetting softness in bamboo and exotic solid subcategories.
On the positive side, LL says its Pro and Install businesses continued to accelerate in Q4. Management noted on the call that for the full year installed sales grew 12% and contributed roughly 13% on a comp store basis. Installation now comprises roughly 12% of revenue and that should continue to grow. LL has officially completed the rollout of installation and has the first year under its belt. Additionally, its Pro business continues to accelerate and now represents 29% of total revenue.
The company has been making improvements on the digital front as it evolves to an omni-channel approach. Starting with revamping its online presence. LL has been improving its website to allow for a seamless shopping experience. LL has also been reshaping its marketing mix to more contemporary business-driving elements. The company has also been moving ad dollars away from less effective channels such as print.
With that said, some issues have been overhanging Lumber Liquidators, including tariffs and the DOJ charges relating to its Chinese-made laminate flooring. On tariffs, LL sources approximately 45% of its products from China. Virtually all of these products had a 10% tariff imposed upon them effective September 24, 2018 and many of these products are at risk to have tariffs increased to 25% unless a trade deal can be worked out.
On the legal front, LL announced last week that it reached a resolution with the US Attorney, the DOJ, and the SEC concerning their criminal and civil investigations into the public disclosures the company made in March 2015 regarding whether its Chinese made laminates were compliant with certain California state regulatory requirements. LL entered into a deferred prosecution agreement (DPA) with the US Attorney and the DOJ and submitted an Offer of Settlement to the SEC. The DPA stated the charge is deferred and will be dismissed after three years provided that the company meets certain obligations, many of which the company has already implemented. See InPlay archive for more details.
Today, the company announced that it has entered into a Memorandum of Understanding (the MOU) with plaintiffs in the Gold Litigation. The parties agree to work together to prepare a final settlement agreement that would resolve on a nationwide basis the claims of all purchasers of Morning Star Strand Bamboo from January 1, 2012 through March 15, 2019, with no admission of fault or liability by the company.
This was another rough quarter for LL. That weak comp number in Q4 was disappointing. Perhaps even more disappointing was the Q1 comp guidance of negative low-single-digits. The spring season is a key time for remodeling and construction so that was a bit disheartening. Hopefully Q2 comps, which also include the spring season, will show improvement.